biostudies-literatureUnknown10(8)Zhang YTHere we present the first complete mitochondrial genome assembly of <i>Rhynchocypris czekanowskii</i> Dybowski, 1869. We characterized a 16,651-bp circular genome comprising 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and a 981-bp control region. Phylogenetic reconstruction using mitochondrial sequences robustly resolved <i>R. czekanowskii</i> as sister to <i>R. lagowskii</i> (bootstrap = 100%), supporting morphological affinities. This work fills a critical genomic gap in <i>Rhynchocypris</i> phylogenetics and has significant implications for both taxonomic revision and the conservation of cold-adapted ichthyofauna in Northeast Asia.Mitochondrial DNA. Part B, Resources763-767https://www.ebi.ac.uk/biostudies/studies/S-EPMC12288181biostudies-literatureThe complete mitochondrial genome of &lt;i&gt;Rhynchocypris czekanowskii&lt;/i&gt; (Cypriniformes, Cyprinidae).PMC12288181Lu CPTong CWChen JZhang YTTao YHLiu WfalseThe complete mitochondrial genome of &lt;i&gt;Rhynchocypris czekanowskii&lt;/i&gt; (Cypriniformes, Cyprinidae).Here we present the first complete mitochondrial genome assembly of <i>Rhynchocypris czekanowskii</i> Dybowski, 1869. We characterized a 16,651-bp circular genome comprising 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes, and a 981-bp control region. Phylogenetic reconstruction using mitochondrial sequences robustly resolved <i>R. czekanowskii</i> as sister to <i>R. lagowskii</i> (bootstrap = 100%), supporting morphological affinities. This work fills a critical genomic gap in <i>Rhynchocypris</i> phylogenetics and has significant implications for both taxonomic revision and the conservation of cold-adapted ichthyofauna in Northeast Asia.2025-01-01T00:00:00Z20252026-03-27T16:10:07.258Z2025-08-28T03:05:56.041ZS-EPMC122881814070879610.1080/23802359.2025.2535639